source:
vbox/trunk/src/libs/libvorbis-1.3.7/lib/bitrate.h@
96360
| Last change on this file since 96360 was 96360, checked in by , 2 years ago | |
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| File size: 1.9 KB | |
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| 1 | /******************************************************************** |
| 2 | * * |
| 3 | * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * |
| 4 | * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * |
| 5 | * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * |
| 6 | * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * |
| 7 | * * |
| 8 | * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 * |
| 9 | * by the Xiph.Org Foundation https://xiph.org/ * |
| 10 | * * |
| 11 | ******************************************************************** |
| 12 | |
| 13 | function: bitrate tracking and management |
| 14 | |
| 15 | ********************************************************************/ |
| 16 | |
| 17 | #ifndef _V_BITRATE_H_ |
| 18 | #define _V_BITRATE_H_ |
| 19 | |
| 20 | #include "vorbis/codec.h" |
| 21 | #include "codec_internal.h" |
| 22 | #include "os.h" |
| 23 | |
| 24 | /* encode side bitrate tracking */ |
| 25 | typedef struct bitrate_manager_state { |
| 26 | int managed; |
| 27 | |
| 28 | long avg_reservoir; |
| 29 | long minmax_reservoir; |
| 30 | long avg_bitsper; |
| 31 | long min_bitsper; |
| 32 | long max_bitsper; |
| 33 | |
| 34 | long short_per_long; |
| 35 | double avgfloat; |
| 36 | |
| 37 | vorbis_block *vb; |
| 38 | int choice; |
| 39 | } bitrate_manager_state; |
| 40 | |
| 41 | typedef struct bitrate_manager_info{ |
| 42 | long avg_rate; |
| 43 | long min_rate; |
| 44 | long max_rate; |
| 45 | long reservoir_bits; |
| 46 | double reservoir_bias; |
| 47 | |
| 48 | double slew_damp; |
| 49 | |
| 50 | } bitrate_manager_info; |
| 51 | |
| 52 | extern void vorbis_bitrate_init(vorbis_info *vi,bitrate_manager_state *bs); |
| 53 | extern void vorbis_bitrate_clear(bitrate_manager_state *bs); |
| 54 | extern int vorbis_bitrate_managed(vorbis_block *vb); |
| 55 | extern int vorbis_bitrate_addblock(vorbis_block *vb); |
| 56 | extern int vorbis_bitrate_flushpacket(vorbis_dsp_state *vd, ogg_packet *op); |
| 57 | |
| 58 | #endif |
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